Toss it in — done, Chaerok handles the rest

You toss it in, Chaerok remembers

Plenty of apps capture notes. Chaerok is different after the capture — organizing and resurfacing are Chaerok's job, not yours.

Toss it in as-is

Text, link, or photo — no titles, no folders to pick. One action from the share sheet, Chrome extension, or web.

Chaerok writes it up

It summarizes, tags, and connects new notes to older ones. The organizing you used to do is already done.

It comes back to you

Morning briefings and a weekly report revive what you forgot. Put it in, and it returns.

Not a storage bin — a brain that speaks first

Most note apps stop at putting things in. Chaerok brings your notes back — so today's capture becomes material for tomorrow's thinking.

Morning briefing

As your day starts, Chaerok hands you yesterday's captures and what's worth revisiting today.

Weekly report

Chaerok weaves a week of scattered notes into one story.

Rediscovery

When an old note meets what you're thinking now, Chaerok surfaces it first.

It's your second brain — thoughts stay on your device

You're trusting it with what's in your head, so every free feature runs entirely on your device. Whether anything goes to the cloud is always your call.

Saved on-device first

Every note lands on your device first. Offline or over any limit, your notes are safe.

Encrypted in transit and at rest

Turn on cloud sync and both transfer and storage are encrypted. Leave it off, and summaries and search run on-device.

No hostage subscription

Cancel and every note stays on your device. Your records are never held on a server, so starting — and leaving — is light.

A dime a day — a second brain lighter than a coffee

Daily briefings, long reads understood in full, your notes on every device — it's the price of getting back the thoughts you used to lose. The basics are free forever without an account, and your first two weeks of Pro are free.

Chaerok — $0 (free forever)

The light way in — core features that run on your device

• Capture text, URLs, and images (unlimited)
• Automatic tagging and folders
• On-device summaries
• Rule-based briefings
• Local semantic search

Chaerok Pro — US$2.99 / month

Understands long reads and photos in full, on every device

• Full long-form understanding (Long Context)
• Understands what's inside images
• AI memory links — related notes, suggested
• Daily briefings written by Chaerok
• Weekly report — your week as a narrative
• Full-text translation
• Cloud sync & backup across devices
• Web and Chrome extension support
• Everything in the free plan

* Billed through the App Store or Google Play in your local currency — US$2.99/month in the US, ₩4,900/month in Korea; prices include VAT and can vary slightly by country. The free trial is offered once per new subscription. The annual plan (2 months free vs monthly) is available on iOS today, with Android coming soon.

Wherever a thought strikes, that's the door

Capture on your phone, capture in Chrome, read on the web. Wherever it comes from, everything lands in one place.

Chaerok app

From capture to briefings — the heart of Chaerok. Start today on iPhone, or join the early access on Android.

Chrome extension

Capture the page you're reading, right where you are. Select a passage first and only that part comes along.

Web notes

Read what you captured on your phone, on a big screen. Connected through Chaerok Pro sync.

Frequently asked questions

Can I use it for free?

Core features — capture, organizing, search — are free forever on your device, no account needed. Full long-form understanding, image understanding, Chaerok's briefings and weekly report, and cross-device sync come with Chaerok Pro, and your first two weeks of Pro are free.

Is my data safe?

Notes are saved on your device first. Sign in and turn on Chaerok Pro cloud sync to back them up and continue on other devices. Bulk export to files like Markdown and CSV is coming gradually.

What happens to my notes if I cancel?

They all stay on your device. Only cloud sync stops — everything that runs on-device keeps working for free.

When can I use it on Android?

The full launch is in the works. You can start today through Google Play early access, and your notes carry over after launch.

Do you support languages other than Korean?

Semantic analysis fully supports Korean and English today, with more languages coming gradually.